<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    let arr = ['刘德华', '张学友', '黎明', '郭富城', '蔡徐坤']
    console.log(arr)
    console.log(arr.length)
    console.log(arr[4] + '会唱跳rap篮球')
  </script>
</body>

</html>